linux-kernel - Re: [PATCH v4 4/8] drm/msm/dp: move parser->parse() and dp_power_client

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Date:   Thu, 28 Sep 2023 00:17:50 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Kuogee Hsieh <quic_khsieh@...cinc.com>
Cc:     dri-devel@...ts.freedesktop.org, robdclark@...il.com,
        sean@...rly.run, swboyd@...omium.org, dianders@...omium.org,
        vkoul@...nel.org, daniel@...ll.ch, airlied@...il.com,
        agross@...nel.org, andersson@...nel.org, quic_abhinavk@...cinc.com,
        quic_jesszhan@...cinc.com, quic_sbillaka@...cinc.com,
        marijn.suijten@...ainline.org, freedreno@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 4/8] drm/msm/dp: move parser->parse() and
 dp_power_client_init() to probe

On Wed, 27 Sept 2023 at 23:54, Kuogee Hsieh <quic_khsieh@...cinc.com> wrote:
>
> Move parser->parse() and dp_power_client_init() from dp_display_bind()
> to dp_display_probe() in preparation of adding pm_runtime framework
> at next patch.
>
> Changes in v4:
> -- split this patch out of "incorporate pm_runtime framework into DP driver" patch
>
> Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
> ---
>  drivers/gpu/drm/msm/dp/dp_display.c | 22 ++++++++++++----------
>  1 file changed, 12 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index 7ae3b8b..3ef141c 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -276,11 +276,6 @@ static int dp_display_bind(struct device *dev, struct device *master,
>         dp->dp_display.drm_dev = drm;
>         priv->dp[dp->id] = &dp->dp_display;
>
> -       rc = dp->parser->parse(dp->parser);
> -       if (rc) {
> -               DRM_ERROR("device tree parsing failed\n");
> -               goto end;
> -       }
>
>
>         dp->drm_dev = drm;
> @@ -291,11 +286,6 @@ static int dp_display_bind(struct device *dev, struct device *master,
>                 goto end;
>         }
>
> -       rc = dp_power_client_init(dp->power);
> -       if (rc) {
> -               DRM_ERROR("Power client create failed\n");
> -               goto end;
> -       }
>
>         rc = dp_register_audio_driver(dev, dp->audio);
>         if (rc) {
> @@ -1249,6 +1239,18 @@ static int dp_display_probe(struct platform_device *pdev)
>                 return -EPROBE_DEFER;
>         }
>
> +       rc = dp->parser->parse(dp->parser);
> +       if (rc) {
> +               DRM_ERROR("device tree parsing failed\n");
> +               return -EPROBE_DEFER;
> +       }
> +
> +       rc = dp_power_client_init(dp->power);
> +       if (rc) {
> +               DRM_ERROR("Power client create failed\n");
> +               return -EPROBE_DEFER;
> +       }

Hit enter too soon. No submodules teardown, so NAK.

Also please propagate returned error codes instead of inventing
EPROBE_DEFER on your own.

> +
>         /* setup event q */
>         mutex_init(&dp->event_mutex);
>         init_waitqueue_head(&dp->event_q);
> --
> 2.7.4
>


-- 
With best wishes
Dmitry